rossop / dxfwrite

dxfwrite

Abstract

A Python library to create DXF R12 drawings.

a simple example:

from dxfwrite import DXFEngine as dxf
drawing = dxf.drawing('test.dxf')
drawing.add(dxf.line((0, 0), (10, 0), color=7))
drawing.add_layer('TEXTLAYER', color=2)
drawing.add(dxf.text('Test', insert=(0, 0.2), layer='TEXTLAYER'))
drawing.save()

supported DXF R12 entities

• ARC
• ATTDEF
• ATTRIB
• BLOCK
• CIRCLE
• 3DFACE
• INSERT
• LINE
• POINT
• POLYLINE (special Polyface and Polymesh objects are available)
• SHAPE (not tested)
• SOLID
• TRACE
• TEXT
• VERTEX (only for internal use, see Polyline, Polyface and Polymesh objects)
• VIEWPORT

not supported DXF R12 entities

• DIMENSION

emulated entities from DXF R13 and later

• MTEXT (R13) ... emulated as composite entity MText
• ELLIPSE (R13) ... approximated by Ellipse
• SPLINE (R13) ... approximated by Spline
• LWPOLYLINE (R13) ... use POLYLINE
• TABLE (R2005) ... emulated as composite entity Table

composite entities

• MText -- multi-line text
• LinearDimension
• AngularDimension
• ArcDimension
• RadialDimension
• Table -- text and blockrefs containing table like a HTML-table
• Ellipse -- approximated as POLYLINE
• Spline -- cubic spline curve through breakpoints without additional control points, approximated as POLYLINE
• Bezier -- cubic bezier curve through breakpoints with additional control points, approximated as POLYLINE
• Clothoid -- Euler spiral, approximated as POLYLINE

read/write AutoCAD ctb-files

The module acadctb provides the ability to read and write AutoCAD ctb-files. With ctb-files you can assign a new color or lineweight to a dxf-color-index for plotting or printing, but this has to be supported by the used application.

a simple example:

from dxfwrite import acadctb
ctb = acadctb.load('test.ctb')
style1 = ctb.get_style(1) # dxf color index (1 .. 255)
style1.set_color(23, 177, 68) # set rgb values (0..255)
style1.set_lineweight(0.7)
ctb.save('new.ctb')

Installation

with pip:

pip install dxfwrite

or from source:

python setup.py install

Documentation

http://dxfwrite.readthedocs.io

The source code repository of dxfwrite can be found at GitHub.com:

https://github.com/mozman/dxfwrite.git

Feedback is greatly appreciated.

Contact

[e-mail]